isolationism isnt exactly what the us needs. they need to work diplomatically with the un, and prepare for Russia being Germany 2.0. it is already happening, they raid people homes for suspected gays, they put themselves on a world stage for all to see then invaded another country that used to be theirs. its Germany all over again, and this time it wont be as easy to stop.
Russia is the biggest country in the world. their land mass alone means USA would have to cross it for months taking out small town after small town of armed combatants who have hated america since before they where born. this is the same reasion the us failed to invade canada. we are way to big. and the white house burned. Russia is almost twice Canada's size, and Russians know how to handle real weather problems. a us invasion would be a laughing stock the first winter.
No, i don't see the re ever being an invasion, everyone is too bomb minded now a days. but i can tell you the first bomb to land on us soil and america wont be the same, overly proud, in your face assholes they try to be now.